Heavy and widespread rains on the peninsula and northeast India will persist through October, the Indian Meteorological Department (IMD) said in its weekly weather report. Northwest India will remain dry and Rajasthan is likely to experience dry weather, but weather models do not show the beginning of the monsoon retreat from Northwest India so far.
Due to heavy rains in South India and parts of Northeast India, the 30% rain deficiency in the week ending 9 September was not only compensated for last week, but an excess of the 7% this week, according to the weekly report. “A change in weather patterns that resulted in rains above normal in the last week of -30%, we reached an excess of 7% in terms of weekly rains. This change was made possible by a low pressure system that formed over the coast of Andhra Pradesh, a cyclonic circulation over the western coast of India that brought rains to the entire southern Indian peninsula. The monsoon trough shifted into the foothills at the end of the week, causing heavy to extremely heavy rains in parts of northeast India, ”said Soma Senroy, a scientist at IMD’s National Weather Forecast Center.
Also read: Monsoon loses North India in September, hits South and East hard
A new low-pressure zone is likely to develop over the north-west of the Bay of Bengal around 20 September, bringing widespread and heavy rains to the east, northeast and mainland of India until late September, while north-west of India is likely to be seriously deficient. Between September 18 and 24, it is likely that it will rain above normal on the west coast of the peninsula as the westerly winds strengthen due to the development of the low pressure zone.
There is a rain deficiency of 12.6% over the country in September; 52.8% deficiency in Northwest India; 33.2% deficiency over central India; 1.9% deficiency in eastern and northeastern India and 75.6% excess rainfall in mainland India. In the monsoon season from June 1 there is 6.7% excess rainfall in the country; 15.1% deficiency in Northwest India; 13.7% excess over central India; Excess of 1.9% over the east and northeast of India and excess of 27.7% over the south of the peninsula.
“Circulation patterns do not yet suggest the withdrawal of the monsoon. We are not seeing a significant reduction in humidity. The westerly winds will strengthen next week due to the development of the low pressure area, ”explained K Sathi Devi, director of the national weather forecast center.
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